package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService bookService;
    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Transactional
    @Override
    public void submit(Orders orders) {
        log.info("orders={}",orders);
        //获取当前用户id
        Long currentId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, currentId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new CustomException("购物车为空,不能下单");
        }
        //生成订单好
        long orderid = IdWorker.getId();
        AtomicInteger amount = new AtomicInteger(0);
        //订单详情
        List<OrderDetail> details = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(item, orderDetail, "id");
            orderDetail.setOrderId(orderid);
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        //查询用户数据
        User user = userService.getById(currentId);
        //查询地址数据
        AddressBook addressBook = bookService.getById(orders.getAddressBookId());
        if (addressBook == null) {
            throw new CustomException("用户地址信息有误,不能下单");
        }

        //向订单表插入数据，一条数据
        orders.setStatus(2);
        //对象属性拷贝
        BeanUtils.copyProperties(addressBook, orders, "id");
        BeanUtils.copyProperties(user, orders, "id","status");
        orders.setUserId(currentId);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + addressBook.getDetail() == null ? "" : addressBook.getDetail());
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        this.save(orders);
        //向订单详细表插入数据，多条
        orderDetailService.saveBatch(details);
        //清空购物车
        shoppingCartService.remove(queryWrapper);
    }
}
